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Finding the Fourth Proportional to 660,352,532.40, 990,528,798.60 and 442,674,298.80

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Solution

The fourth proportional to 660,352,532.40, 990,528,798.60 and 442,674,298.80 is: 664,011,448.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,352,532.40 : 990,528,798.60 = 442,674,298.80 : x
  2. Step 2: Convert to fraction form
    660,352,532.40/990,528,798.60 = 442,674,298.80/x
  3. Step 3: Cross multiply
    660,352,532.40x = 990,528,798.60 × 442,674,298.80
  4. Step 4: Simplify right side
    660,352,532.40x = 438,481,641,361,461,440
  5. Step 5: Solve for x
    x = 438,481,641,361,461,440/660,352,532.40
  6. Step 6: Final answer
    x = 664,011,448.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.